Letter opener



FIG. 1 is a top plan view of a letter opener showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a left side elevational view thereof.

The undisclosed bottom plan view opposite of FIG. 1 is a mirror image thereof. 

The ornamental design for a letter opener, as shown and described. 